Battles on 21 June

16 battles fought (or begun) on 21 June, from 1650 to 1992, in date order. Dates are from Wikidata and are shown only for battles from 1600 onwards with a single exact date. Dates recorded in the Julian (Old Style) calendar are listed under their Julian day and marked.

Which battles happened on 21 June?

The best-known battles on this day (by number of Wikipedia language editions) are Battle of Vitoria (1813), Scuttling of the German fleet at Scapa Flow (1919), Battle of Kilkis–Lachanas (1913).

• Battle of Scarrifholis 21 June 1650Ireland · Cromwellian conquest of Ireland
• Battle of the Dardanelles (1655) 21 June 1655At sea · Cretan War of 1645-1669
• Siege of Tournai (1667) 21 June 1667 – 26 June 1667Belgium · War of Devolution
• Battle of Vinegar Hill 21 June 1798Ireland · Irish Rebellion of 1798
• Battle of Tabkin Kwatto 21 June 1804Nigeria · Sokoto Revolution
• Battle of Vitoria 21 June 1813Spain · Peninsular War
• Battle of Pered 21 June 1849Slovakia · Hungarian Revolution of 1848
• Battle of Simmon's Bluff 21 June 1862United States · American Civil War
• Battle of Upperville 21 June 1863United States · American Civil War
• Battle of Jerusalem Plank Road 21 June 1864 – 23 June 1864United States · American Civil War
• Battle of Los Corrales 21 June 1880Argentina · Revolution of 1880
• Battle of Kilkis–Lachanas 21 June 1913Greece · Second Balkan War
• Battle of Bukoba 21 June 1915 – 23 June 1915Tanzania · World War I
• Scuttling of the German fleet at Scapa Flow 21 June 1919Scotland · World War I
• Battle of Sarantaporos (1943) 21 June 1943Greece · World War II
• Battle of the Miljevci Plateau 21 June 1992 – 23 June 1992Croatia · Croatian War of Independence